Stress-induced softening and hardening in a bulk metallic glass

被引：45

作者：

Chen, L. Y. ^{[1
,3
]}

Ge, Q. ^{[1
,2
]}

Qu, S. ^{[1
,2
]}

Jiang, J. Z. ^{[1
,3
]}

机构：

[1] Zhejiang Univ, ICNSM, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Inst Appl Mech, Sch Aeronaut & Astronaut, Hangzhou 310027, Peoples R China

[3] Zhejiang Univ, Lab New Struct Mat, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

SCRIPTA MATERIALIA | 2008年 / 59卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Metallic glasses; Hardness; Shear bands; Residual stresses;

D O I：

10.1016/j.scriptamat.2008.08.021

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To uncover the influence of pre-existing/residual stress on the mechanical behavior of metallic glass, the micro-Vickers indentation of a stressed metallic glass was studied. The pre-existing stress was introduced by bending. The results show that the nominal hardness decreases with pre-existing tensile stress and increases with pre-existing compressive stress. The real hardness decreases with pre-existing tensile stress, but does not increase obviously with pre-existing compressive stress. The mechanism of the strong hardness dependence on stress was investigated using finite element analysis. The unexpected hardness dependence on pi-c-existing compressive stress is also discussed. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1210 / 1213

页数：4

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